Examination of the validity of the constitutive equations based on a fabric lattice model -The comparisons with experiments for fabric membranes under cyclic loadings -

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Publication year 1996
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Title Examination of the validity of the constitutive equations based on a fabric lattice model -The comparisons with experiments for fabric membranes under cyclic loadings -
Author Shiro Kato,Tatsuya Yoshino,Fumiyoshi Takeda,Tomoko Ono
Summary The present study aims at confirming the validity of the formerly proposed constitutive equations for fabric membranes under cyclic loadings. The crimp interchange, material nonlinearities of the yarns and coatingsĀEĆand the interaction between the yarns and coatings are considered in the equations as a nonlinear continuum. ThereforeĀEĆthe equations have a form that can be directly applied to FEM analysis. In the experiments the authors performed three loading tests. FirstĀEĆin the bi-axial loading tests the tensile stress ratio was kept constant during all the process of this experiment. SecondĀEĆthe ratio was changed during the cyclic loading depending on the change of stress ratio. FinallyĀEĆshear loading test was executed by controlling shear strain with initially introduced tension stresses. The validity of the proposed constitutive equations was confirmed by comparing the stress-strain relationships of analytical results with those from experiments under cyclic loadings.